The Drachenfels ("Dragon's Rock") is a hill in the Siebengebirge uplands between Königswinter and Bad Honnef in Germany. The hill was formed by rising magma that could not break through to the surface, and then cooled and became solid underneath. It is the subject of much tourism and romanticism in the North Rhine-Westphalia area. Source: https://en.wikipedia.org/wiki/Drachenfels_(Siebengebirge)